http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Jianghong Xue (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
A comprehensive study on a propagating buckle in externally pressurized pipelines
Jianghong Xue,Neng Gan 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
Buckle propagation is a unique phenomenon occurring in deep-sea pipelines. In previous works, this phenomenon was investigated usinga ring technique in which the pipeline was assumed to be in plane strain condition and the energies absorbed in membrane stretchingand longitudinal bending were ignored. This paper presents a three-dimensional analysis of the buckle propagation phenomenon with anemphasis to address more complete factors that were not accounted for in the ring analysis. The analyses are based on the available solutionsof the transition zone obtained in our previous works. A comprehensive mechanism for buckle propagation phenomenon is describedfrom the point view of plastic stability theory for shells which enables the incorporation of the effects of transverse and longitudinalbending, membrane stretching and material strain hardening. The nondimensionalized buckle propagation pressure is represented interms of yield coefficient, strain hardening coefficient and membrane stretching factor. It is found that a buckle once initiated in a pipelinemay or may not propagate along the pipeline depending on its radius-to-thickness ratio. By comparing with various experimentalresults the theoretical predictions from this analysis are shown to provide very accurate estimations of the buckle propagation pressure fordifferent materials with diverse geometric parameters and material properties. This paper points to the need for more complete informationregarding the effects of transverse bending, membrane stretching and material strain-hardening on the buckle propagation pressure. Upon the requirement of application variations of the yield coefficient, strain hardening coefficient and membrane stretching factor withrespect to the radius-to-thickness ratio are sketched out. This eliminates the need for recourse the curves and allows a fast and convenientresolution of buckle propagation pressure for certain pipeline. Most importantly, the present analysis offers the potential for future designof pipelines being at once more rationally and parametrically complete, and yet compact and simple to apply.
-
Orthotropic Analysis of Steel Deck–Girder–Rib Systems Subjected to Transverse Load
Mu Chen,Jianghong Xue,Ping Li,Fusong Jin 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.3
As one of the advanced modern techniques, orthotropic steel decks are widely used in bridge engineering. Because of its structural complexity, theoretical analysis of mechanical performances of the orthotropic steel bridge deck is very diffi cult. Therefore, in the past 50 years, a series of experiments and fi nite element analysis have been used to obtain the information. A steel deck–girder–rib bridge system subjected to the transverse load is investigated in this paper. The bridge deck is laid on four simply-supported girders at the four edges and is reinforced by ribs in longitudinal direction. The longitudinally stiff ened deck is idealized as an orthotropic plate. The equivalent material properties in the longitudinal and breadth directions of the orthotropic plate are evaluated using micro-mechanics of composite material by treating the ribs as reinforcing fi ber-beams. Governing equations for the deck–girder–rib bridge systems are established and are solved using Ritz method. The analytical solutions are substantiated by comparing with the classic solutions of an isotropic deck with fi xed ends and with the fi nite element predictions. The analytical approach presented in this paper eliminates the very intricate and arduous kinematics study among deck–girder–rib and allows the bridge engineer to fast and convenient estimate the deformation in an orthotropic bridge deck.
-
Capacity Analysis of Centralized Cognitive Radio Networks for Best-effort Traffics
( Mingming Lin ),( Xuemin Hong ),( Jin Xiong ),( Ke Xue ),( Jianghong Shi ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.9
A centralized cognitive radio (CR) network is proposed and its system capacity is studied. The CR network is designed with power control and multi-user scheduling schemes to support best-effort traffics under peak interference power constraints. We provide an analytical framework to quantify its system capacity, taking into account various key factors such as interference constraints, density of primary users, cell radius, the number of CR users, and propagations effects. Furthermore, closed-form formulas are derived for its capacities when only path loss is considered in the channel model. Semi-analytical expressions for the capacities are also given when more realistic channel models that include path loss, shadowing, and small-scale fading are used. The accuracy of the proposed analytical framework is validated by Monte Carlo simulations. Illustrated with a practical example, the provided analytical framework is shown to be useful for the strategic planning of centralized CR networks.
ScienceON
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
